CN117748147A - High-gain broadband multi-line polarization resonant cavity antenna based on non-uniform super surface - Google Patents
High-gain broadband multi-line polarization resonant cavity antenna based on non-uniform super surface Download PDFInfo
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Abstract
The invention discloses a high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super-surface, which is suitable for the field of wireless communication and comprises a metal cavity, a grounding plate, a lower medium substrate, a multi-line polarization feed source, a support column, a lower non-uniform super-surface, an upper medium substrate and an upper non-uniform super-surface which are sequentially arranged from bottom to top; the multi-line polarization feed source is arranged above the lower medium substrate, and the lower non-uniform super surface is printed on the lower surface of the upper medium substrate and comprises square metal microstrip patches which are distributed in a rectangular array and provided with circular gaps; the upper non-uniform super surface is printed on the upper surface of the upper dielectric substrate and comprises round metal microstrip patches which are distributed in a rectangular array. The high-gain broadband multi-line polarization resonant cavity antenna designed by the invention has wide working bandwidth, high gain and large number of linear polarizations, can realize 7 linear polarization state switching in the frequency band of 9.28GHz-11.32GHz, and solves the problems of low gain, narrow bandwidth and few linear polarization states of the existing multi-line polarization resonant cavity antenna.
Description
Technical Field
The invention belongs to the technical field of antennas, and relates to a resonant cavity antenna, in particular to a high-gain multi-line polarization resonant cavity antenna based on a non-uniform super surface.
Background
Currently, with the development of electronic technology and wireless communication technology, electronic devices have a trend of broadband and large capacity. Meanwhile, as the electromagnetic environment where the electronic equipment is located is increasingly complex and the gestures are various, the problems of shortened communication distance, reduced channel quality and the like caused by polarization mismatch are difficult to avoid in the traditional single polarization antenna. As a polarization mode reconfigurable component, the multi-polarization resonant cavity antenna has the characteristics of simple structure and high gain, and can effectively reduce path interference and weaken the influence caused by polarization mismatch. For example, in the paper A simpledesign of polarization reconfigurable Fabry-Perot resonator antenna by h.tran et al, a resonant cavity antenna designed by loading a switching diode at two corners of a rectangular microstrip patch feed source is realized to switch between one linear polarization, one left-hand circular polarization and one right-hand circular polarization, and the circular polarization antenna has 50% of energy loss at maximum naturally when receiving any linear polarization electromagnetic wave, so that the application range of the antenna is restricted. In the paper Polarization reconfigurable high-gain fabric-Perot cavity antenna, jeon et al realizes the polarization state control of the radiated electromagnetic wave by reconstructing the electromagnetic characteristics of the super surface, and the linear polarization state is only three and the working bandwidth is narrow although the multi-line polarization performance is realized, and the blind area for receiving any linear polarized electromagnetic wave still exists and the anti-interference capability is weak.
In view of this, it is necessary to provide a resonant cavity antenna capable of realizing high-gain broadband multi-line polarization, and the linear polarization state can be flexibly and rapidly controlled by a switching circuit, so as to meet the development requirement of wireless communication.
Disclosure of Invention
The invention provides a high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super surface, which aims to solve the problems of insufficient linear polarization quantity, low gain and narrow bandwidth of the existing multi-polarization resonant cavity antenna.
The invention is realized by the following technical scheme:
a high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super surface comprises a feed port, a metal cavity, a grounding plate, a lower medium substrate, a multi-line polarization feed source, a support column, a lower non-uniform super surface, an upper medium substrate and an upper non-uniform super surface which are sequentially arranged from bottom to top; the metal cavity, the grounding plate, the lower medium substrate, the lower non-uniform super surface, the upper medium substrate and the upper non-uniform super surface are all round, the axes are positioned on the same straight line, and the diameter of the metal cavity is slightly larger than that of the grounding plate, the lower medium substrate, the lower non-uniform super surface, the upper medium substrate and the upper non-uniform super surface.
The grounding plate is printed on the lower surface of the lower medium substrate and comprises a circular opening, seven direct current bias pads and seven direct current isolation inductors, wherein the circular opening is arranged at the center position and used for penetrating through the outer core of the feed port;
seven printed rectangular metal microstrip patches are arranged in the center of the upper surface of the lower dielectric substrate, each rectangular metal microstrip patch is identical in size, and included angles between adjacent rectangular metal microstrip patches are equal;
the multi-line polarization feed source is arranged above the lower dielectric substrate, and the axis is overlapped with the lower dielectric substrate and comprises a first dielectric substrate and a second dielectric substrate; seven switching diodes, a round metal bonding pad and seven rectangular metal microstrip patches are printed on the upper surface of the first dielectric substrate; seven switch diodes are distributed at equal intervals around the round metal bonding pad, the positive electrode of each switch diode is connected with the round metal bonding pad, the negative electrode of each switch diode is connected with a rectangular metal microstrip patch, the round metal bonding pad is connected with the inner core of the feed port, each rectangular metal microstrip patch is connected with one of seven rectangular metal microstrip patches printed on the upper surface of the lower-layer dielectric substrate through a metal column, and the seven rectangular metal microstrip patches penetrate through the lower-layer dielectric substrate to be connected with one of seven direct current bias bonding pads; a dielectric column is arranged between the first dielectric substrate and the lower dielectric substrate for isolation; a circular radiation microstrip patch is printed on the upper surface of the second dielectric substrate, and a dielectric column is arranged between the second dielectric substrate and the first dielectric substrate for isolation;
the lower non-uniform super surface is printed on the lower surface of the upper medium substrate and comprises square metal microstrip patches with circular gaps distributed in a rectangular array, the circular gaps are all positioned at the center of the square metal microstrip patches, the diameters of the circular gaps distributed in square rings are the same, and the circular gaps positioned in different square rings are different in size;
the distance between the lower surface of the upper dielectric substrate and the grounding plate is determined by the height h of the supporting column, and the calculation formula is as follows:wherein n is the number of square rings, and the square rings are marked sequentially from inside to outsideLambda is the operating wavelength, ">A reflection coefficient phase value of a non-uniform super-surface, < ->The phase value of the reflection coefficient of the grounding plate;
the upper non-uniform super surface is printed on the upper surface of the upper medium substrate and comprises round metal microstrip patches distributed in a rectangular array, the diameters of the round metal microstrip patches distributed in square rings are the same, but the sizes of the round metal microstrip patches positioned in different square rings are different; the square metal microstrip patch with the circular gap on the lower non-uniform super surface and the circular metal microstrip patch with the circular gap on the upper non-uniform super surface are combined into a partial reflection unit;
the calculation formulas of the square metal microstrip patch with the circular gap and the circular metal microstrip patch are as follows:wherein n is the number of square rings, and the square rings are marked sequentially from inside to outsideR n The reflection amplitude value corresponds to the square ring;
when the antenna works, a signal fed in by the feed port can only pass through the rectangular metal microstrip patch conducted by the switching diode, a strong current is generated on the corresponding rectangular metal microstrip patch, and then a radiation electromagnetic wave is generated on the circular radiation microstrip patch; the radiated electromagnetic wave is reflected between the grounding plate and the non-uniform super-surface for multiple times, and part of electromagnetic energy is radiated to free space through the non-uniform super-surface during each reflection, so that a high-gain directional beam is formed in the axial direction. When the different switching diodes are turned on, the linearly polarized radiation beam can be formed at different azimuth planes. Compared with the existing multi-line polarization resonant cavity antenna, the high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super surface has the advantages of simple structure, wide working frequency band and large number of linear polarization states, and can reach 7.
The invention has reasonable structure and ingenious design, effectively solves the problems of low gain, narrow bandwidth and few linear polarization states of the traditional multi-line polarization resonant cavity antenna, and is suitable for the field of wireless communication.
Drawings
FIG. 1 is a schematic three-dimensional structure of a high-gain broadband multi-line polarized resonant cavity antenna based on a non-uniform super surface according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of a high-gain broadband multi-line polarized resonant cavity antenna based on a non-uniform super surface according to an embodiment of the present invention;
fig. 3 is a schematic view of a grounding plate according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the upper surface structure of a lower dielectric substrate according to an embodiment of the present invention;
fig. 5 is a schematic three-dimensional structure of a multi-line polarization feed source according to an embodiment of the present invention;
fig. 6 is a longitudinal cross-sectional view of a multi-line polarized feed provided by an embodiment of the invention;
FIG. 7 is a schematic view of a structure of a lower non-uniform supersurface according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a top non-uniform supersurface according to an embodiment of the invention;
FIG. 9 is a schematic three-dimensional structure of a single partially reflective element of a non-uniform supersurface according to an embodiment of the invention;
FIG. 10 is a graph of simulation results between reflection phases and frequencies of partial reflection units forming a square ring from inside to outside according to an embodiment of the present invention;
FIG. 11 is a graph of simulation results between reflection amplitude and frequency of a partial reflection unit forming a square ring from inside to outside according to an embodiment of the present invention;
FIG. 12 is a graph showing the result of the relationship between return loss and frequency for any one of seven linear polarizations provided by embodiments of the present invention;
fig. 13 is a far-field normalized radiation pattern of phi=0° at 9.4GHz for any one of seven linear polarization states provided by an embodiment of the present invention;
fig. 14 is a far-field normalized radiation pattern of phi=90° at 9.4GHz for any one of seven linear polarization states provided by an embodiment of the present invention;
fig. 15 is a far normalized field radiation pattern of any one of seven linear polarization states provided by an embodiment of the present invention, phi=0° at 10.0 GHz;
fig. 16 is a far normalized field radiation pattern of phi=90° at 10.0GHz for any of seven linear polarization states provided by an embodiment of the present invention;
fig. 17 is a far-field normalized radiation pattern of phi=0° at 10.6GHz for any one of seven linear polarization states provided by an embodiment of the present invention;
fig. 18 is a far-field normalized radiation pattern of phi=90° at 9.4GHz for any one of seven linear polarization states provided by an embodiment of the present invention;
FIG. 19 is a plot of gain versus frequency for any of seven linear polarization states provided by an embodiment of the present invention;
in the figure, a 1-feed port, a 2-metal cavity, a 3-ground plate, a 31-round opening, a 32-direct current bias pad, a 33-direct current isolation inductor, a 4-lower dielectric substrate, a 41-rectangular metal microstrip patch, a 5-multi-line polarization feed source, a 51-dielectric substrate I, a 52-dielectric substrate II, a 53-switching diode, a 54-round metal pad, a 55-rectangular metal microstrip patch, a 56-metal column, a 57-round radiation microstrip patch, a 58-dielectric column, a 6-support column, a 7-lower non-uniform super surface, a 71-square metal microstrip patch with round gaps, an 8-upper dielectric substrate, a 9-upper non-uniform super surface and a 91-round microstrip patch.
In addition, n is set to be 4 in the embodiment, and the square ring (4) is circular due to the high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super surface in the embodiment, and the outermost square ring only presents 16 partial reflection units.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Specific embodiments of the present invention will be described in detail below with reference to fig. 1 to 19.
In one embodiment, a high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super-surface is disclosed, and comprises a feed port 1, a metal cavity 2, a grounding plate 3, a lower dielectric substrate 4, a multi-line polarization feed source 5, a support column 6, a lower non-uniform super-surface 7, an upper dielectric substrate 8 and an upper non-uniform super-surface 9 which are sequentially arranged from bottom to top; the metal cavity 2, the grounding plate 3, the lower medium base 4 plate, the lower non-uniform super surface 7, the upper medium base 8 and the upper non-uniform super surface 9 are all round, the axes are positioned on the same straight line, and the diameter of the metal cavity 2 is slightly larger than that of the grounding plate 3, the lower medium base 4, the lower non-uniform super surface 7, the upper medium base 8 and the upper non-uniform super surface 9.
The grounding plate 3 is printed on the lower surface of the lower dielectric substrate 4 and comprises a circular opening 31, seven direct current bias pads 32 and seven direct current isolation inductors 33 which are arranged at the central position, wherein the circular opening 31 is used for penetrating through the outer core of the feed port 1;
seven printed rectangular metal microstrip patches 41 are arranged in the center of the upper surface of the lower dielectric substrate 4, the size of each rectangular metal microstrip patch 41 is the same, and the included angles between adjacent rectangular metal microstrip patches 41 are equal;
the multi-line polarization feed source 5 is arranged above the lower dielectric substrate 4, and the axis is overlapped with the lower dielectric substrate 4 and comprises a first dielectric substrate 51 and a second dielectric substrate 52; seven switching diodes 53, a round metal bonding pad 54 and seven rectangular metal microstrip patches 55 are printed on the upper surface of the first dielectric substrate; seven switching diodes 53 are distributed at equal intervals around the circular metal pad 54, the positive electrode of each switching diode 53 is connected with the circular metal pad 54, the negative electrode of each switching diode 53 is connected with a rectangular metal microstrip patch 55, the circular metal pad 54 is connected with the inner core of the feed port 1, each rectangular metal microstrip patch 55 is connected with one of seven rectangular metal microstrip patches 41 printed on the upper surface of the lower medium substrate 4 through a metal column 56, and the rectangular metal microstrip patch 55 is connected with one of seven direct current bias pads 32 through the lower medium substrate 4; a dielectric column 58 is arranged between the first dielectric substrate 51 and the lower dielectric substrate 4 for isolation; a circular radiation microstrip patch 57 is printed on the upper surface of the second medium substrate 52, and a medium column 58 is arranged between the second medium substrate 52 and the first medium substrate 51 for isolation;
the lower non-uniform super surface 7 is printed on the lower surface of the upper medium substrate 8 and comprises square metal microstrip patches 71 which are distributed in a rectangular array and provided with circular gaps, the circular gaps are all positioned at the center of the square metal microstrip patches, the diameters of the circular gaps distributed in square rings are the same, but the circular gaps positioned in different square rings are different in size;
the distance between the lower surface of the upper dielectric substrate 8 and the ground plate 3 is determined by the height h of the support column 6, and the calculation formula is as follows:wherein n is the number of square rings, and the square rings are marked sequentially from inside to outsideLambda is the operating wavelength, ">A reflection coefficient phase value of a non-uniform super-surface, < ->The phase value of the reflection coefficient of the grounding plate;
the upper non-uniform super surface 9 is printed on the upper surface of the upper medium substrate 8, and is covered withThe circular metal microstrip patches 91 are distributed in rectangular arrays, the diameters of the circular metal microstrip patches 91 distributed in square rings are the same, but the circular metal microstrip patches 91 positioned in different square rings are different in size; the square metal microstrip patch 71 with the circular gap on the lower non-uniform super-surface and the circular metal microstrip patch 91 with the circular gap on the upper non-uniform super-surface are combined into a partial reflection unit; the calculation formula of the dimensions of the square metal microstrip patch 71 and the circular metal microstrip patch 91 with circular gaps is:wherein n is the number of square rings, and the square rings are marked sequentially from inside to outsideR n The reflection amplitude value corresponds to the square ring;
in the specific implementation, the feed port (1) adopts an SMA connector with 50 ohm input impedance and is externally connected with a direct current bias device to feed in microwave signals; the diameter of the metal cavity (2) is 72mm, and the height is 5mm; the diameter of the grounding plate (3) is 70mm; the diameter of the circular opening (31) is 4.32mm; the side length x width of the DC bias pad (32) is 1.3mm x 1.3mm; the inductance value of the direct current isolation inductor (33) is 3.2nH; the diameter of the lower dielectric substrate (4) is 70mm, the thickness is 0.5mm, the dielectric constant is 2.2, and the loss tangent value is 0.0009; the length multiplied by the width of the rectangular metal microstrip patch (41) is 3.77mm multiplied by 0.85mm; the first dielectric substrate (51) had a diameter of 20mm, a thickness of 0.8mm, a dielectric constant of 2.2 and a loss tangent of 0.0009; the second dielectric substrate (52) has a diameter of 20mm, a thickness of 0.8mm, a dielectric constant of 2.2 and a loss tangent of 0.0009; the on-resistance value of the switching diode (53) is 5.2 ohms, and the off state is that 5000 ohms and an 18fF capacitor are connected in parallel; the diameter of the circular metal pad (54) is 2.2mm; the length multiplied by the width of the rectangular metal microstrip patch (55) is 2.82mm multiplied by 0.8mm; the diameter of the metal column (56) is 0.4mm, and the height is 1.8mm; the diameter of the circular radiation microstrip patch (57) is 7.6mm; the diameter of the medium column (58) is 2mm, and the height is 0.5mm; the diameter of the supporting column (6) is 2mm, and the height is 15.5mm; the length multiplied by the width of the square metal microstrip patch (71) with the round gaps is 8mm multiplied by 8mm, and the round gaps forming a square ring from inside to outside are 4.3mm, 4.64mm, 4.96mm and 5.64mm in sequence; the diameter of the upper dielectric substrate (8) is 70mm, the thickness is 0.8mm, the dielectric constant is 2.2, and the loss tangent value is 0.0009; the circular metal microstrip patch (91) sequentially comprises 7.84mm, 7.82mm, 7.7mm and 7.56mm from inside to outside between circular gaps forming a square ring.
Fig. 1 to 9 show a high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super-surface, which comprises a feed port 1, a metal cavity 2, a grounding plate 3, a lower dielectric substrate 4, a multi-line polarization feed source 5, a support column 6, a lower non-uniform super-surface 7, an upper dielectric substrate 8 and an upper non-uniform super-surface 9 which are sequentially arranged from bottom to top; the metal cavity 2, the grounding plate 3, the lower medium base 4 plate, the lower non-uniform super surface 7, the upper medium base 8 and the upper non-uniform super surface 9 are all round, the axes are positioned on the same straight line, and the diameter of the metal cavity 2 is slightly larger than that of the grounding plate 3, the lower medium base 4, the lower non-uniform super surface 7, the upper medium base 8 and the upper non-uniform super surface 9. The grounding plate 3 is printed on the lower surface of the lower dielectric substrate 4 and comprises a circular opening 31, seven direct current bias pads 32 and seven direct current isolation inductors 33 which are arranged at the central position, wherein the circular opening 31 is used for penetrating through the outer core of the feed port 1; seven printed rectangular metal microstrip patches 41 are arranged in the center of the upper surface of the lower dielectric substrate 4, the size of each rectangular metal microstrip patch 41 is the same, and the included angles between adjacent rectangular metal microstrip patches 41 are equal; the multi-line polarization feed source 5 is arranged above the lower dielectric substrate 4, and the axis is overlapped with the lower dielectric substrate 4 and comprises a first dielectric substrate 51 and a second dielectric substrate 52; seven switching diodes 53, a round metal bonding pad 54 and seven rectangular metal microstrip patches 55 are printed on the upper surface of the first dielectric substrate; seven switch diodes 53 are distributed at equal intervals around a round metal pad 54, the positive poles of the seven switch diodes 53 are connected with the round metal pad 54, the negative pole of each switch diode 53 is connected with a rectangular metal microstrip patch 55, the round metal pad 54 is connected with the inner core of the feed port 1, and each rectangular microstrip patch 55 is connected with the upper surface of the lower dielectric substrate 4 through a metal column 56One of seven rectangular metal microstrip patches 41 printed on the surface is connected with one of seven direct current bias pads 32 through the lower dielectric substrate 4; a dielectric column 58 is arranged between the first dielectric substrate 51 and the lower dielectric substrate 4 for isolation; a circular radiation microstrip patch 57 is printed on the upper surface of the second medium substrate 52, and a medium column 58 is arranged between the second medium substrate 52 and the first medium substrate 51 for isolation; the lower non-uniform super surface 7 is printed on the lower surface of the upper medium substrate 8 and comprises square metal microstrip patches 71 which are distributed in a rectangular array and provided with circular gaps, the circular gaps are all positioned at the center of the square metal microstrip patches, the diameters of the circular gaps distributed in square rings are the same, but the circular gaps positioned in different square rings are different in size; the distance between the lower surface of the upper dielectric substrate 8 and the ground plate 3 is determined by the height h of the support column 6, and the calculation formula is as follows:wherein n is the number of square rings as required, and the square rings are marked as +.> Lambda is the operating wavelength, ">A reflection coefficient phase value of a non-uniform super-surface, < ->The phase value of the reflection coefficient of the grounding plate; the upper non-uniform super surface 9 is printed on the upper surface of the upper medium substrate 8 and comprises circular metal microstrip patches 91 distributed in a rectangular array, the diameters of the circular microstrip patches 91 distributed in square rings are the same, but the circular metal microstrip patches 91 positioned in different square rings are different in size; the square metal microstrip patch 71 with circular gap on the lower non-uniform super-surface and the circular metal microstrip patch 91 on the upper non-uniform super-surface are combined into a partA reflection unit; the calculation formula of the dimensions of the square metal microstrip patch 71 and the circular metal microstrip patch 91 with circular gaps is:wherein n is the number of square rings, and the square rings are marked sequentially from inside to outsideR n To correspond to the amplitude of the reflection amplitude of the square ring.
Fig. 10 shows simulation results between reflection phases and frequencies of partial reflection units forming a square ring from inside to outside, wherein the simulation results are obtained by respectively performing simulation calculation on the reflection phases of the partial reflection units with different sizes by using commercial simulation software ANSYS HFSS, the reflection phase difference value of the partial reflection units at a center frequency point of 10GHz is within 2 degrees, and the reflection phases gradually increase along with the increase of the frequencies in an operating frequency band of 9.5GHz to 10.5GHz, so that the high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super-surface provided by the embodiment of the invention has a positive correlation trend.
Fig. 11 shows simulation results between reflection amplitudes and frequencies of partial reflection units forming a square ring from inside to outside of the high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super-surface, wherein the simulation results are obtained by respectively performing simulation calculation on reflection phases of the partial reflection units with different sizes by using commercial simulation software ANSYS HFSS, and the reflection amplitudes of the partial reflection units at a center frequency point of 10GHz are 0.71, 0.82, 0.87 and 0.90 in sequence.
Fig. 12 shows the result of the relationship between the return loss and the frequency of any one of the seven linear polarization states provided by the embodiment of the present invention, and when the return loss is less than-10 dB as a standard, the working frequency band covered by any one linear polarization is 9.28GHz-11.32GHz.
Fig. 13 to fig. 18 show far-field normalized radiation patterns of phi=0° and 90 ° at different frequency points of 9.4GHz, 10.0GHz and 10.6GHz in any one of seven linear polarization states provided by the embodiment of the present invention, the maximum radiation direction of the antenna is +z axis, no deviation phenomenon and lobe phenomenon occur, and the cross polarization level is substantially lower than the main polarization by 13dB within the 3-dB lobe width.
Fig. 19 shows the relationship between the gain and the frequency of any one of the seven linear polarization states provided by the embodiment of the present invention, where the obtained maximum gain is 15.08dBi, and a relatively stable gain is maintained in a relatively wide operating band.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (9)
1. A high-gain broadband multi-line polarization resonant cavity antenna based on a non-uniform super surface comprises a feed port (1), a metal cavity (2), a grounding plate (3), a lower dielectric substrate (4), a multi-line polarization feed source (5), a support column (6), a lower non-uniform super surface (7), an upper dielectric substrate (8) and an upper non-uniform super surface (9) which are sequentially arranged from bottom to top.
2. The high-gain broadband multi-line polarized resonant cavity antenna based on the non-uniform super surface according to claim 1, wherein the metal cavity (2), the grounding plate (3), the lower dielectric substrate (4), the lower non-uniform super surface (7), the upper dielectric substrate (8) and the upper non-uniform super surface (9) are all round, the axes are positioned on the same straight line, and the diameter of the metal cavity (2) is slightly larger than that of the grounding plate (3), the lower dielectric substrate (4), the lower non-uniform super surface (7), the upper dielectric substrate (8) and the upper non-uniform super surface (9).
3. The high-gain broadband multi-line polarized cavity antenna based on non-uniform super surface according to claim 1, characterized in that the ground plate (3) is printed on the lower surface of the lower dielectric substrate (4), comprising a circular opening (31), seven dc bias pads (32) and seven dc isolation inductors (33) arranged at the center, wherein the circular opening (31) is used for passing through the outer core of the feed port (1).
4. The high-gain broadband multi-line polarized resonant cavity antenna based on the non-uniform super surface according to claim 1, wherein the center position of the upper surface of the lower dielectric substrate (4) is seven printed rectangular metal microstrip patches (41), each rectangular metal microstrip patch (41) has the same size, and the included angles between the adjacent rectangular metal microstrip patches (41) are equal.
5. The high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super surface according to claim 1, wherein a multi-line polarization feed source (5) is arranged above a lower layer dielectric substrate (4), and the axis is coincident with the lower layer dielectric substrate (4) and comprises a first dielectric substrate (51) and a second dielectric substrate (52); seven switching diodes (53), a round metal bonding pad (54) and seven rectangular metal microstrip patches (55) are printed on the upper surface of the first dielectric substrate (51); seven switch diodes (53) are distributed at equal intervals around a round metal pad (54), the positive electrode of each switch diode (53) is connected with the round metal pad (54), the negative electrode of each switch diode (53) is connected with a rectangular metal microstrip patch (55), the round metal pad (54) is connected with the inner core of the feed port (1), each rectangular metal microstrip patch (55) is connected with one of seven rectangular metal microstrip patches (41) printed on the upper surface of the lower medium substrate (4) through a metal column (56), and the seven rectangular metal microstrip patches are connected with one of seven direct current bias pads (32) through the lower medium substrate (4); a dielectric column isolation (58) is arranged between the first dielectric substrate (51) and the lower dielectric substrate (4); a circular radiation microstrip patch (57) is printed on the upper surface of the second dielectric substrate, and a dielectric column (58) is arranged between the second dielectric substrate and the first dielectric substrate for isolation.
6. The high-gain broadband multi-line polarized resonant cavity antenna based on the non-uniform super surface according to claim 1, wherein the lower non-uniform super surface (7) is printed on the lower surface (8) of the upper dielectric substrate, and comprises square metal microstrip patches (71) with circular slits distributed in a rectangular array, wherein the circular slits are all positioned in the center of the square metal microstrip patches, and the diameters of the circular slits distributed in square rings are the same, but the circular slits positioned in different square rings are different in size.
7. The non-uniform super surface based high gain broadband multi-line polarized resonant cavity antenna according to claim 1, wherein the distance between the lower surface of the upper dielectric substrate (8) and the ground plate is determined by the height h of the support column (6), and the calculation formula is:wherein n is the number of square rings as desired, and the square rings are labeled (1), (2), (3) … in this order from the inside to the outsideLambda is the operating wavelength, ">A reflection coefficient phase value of a non-uniform super-surface, < ->Is the phase value of the reflection coefficient of the ground plate.
8. The high-gain broadband multi-line polarization resonant cavity antenna based on the non-uniform super surface according to claim 1, wherein the upper non-uniform super surface (8) is printed on the upper surface of the upper dielectric substrate (8), and comprises circular metal microstrip patches (91) distributed in a rectangular array, wherein the diameters of the circular metal microstrip patches (91) distributed in square rings are the same, but the sizes of the circular metal microstrip patches (91) located in different square rings are different; the square metal microstrip patch (71) with the circular gap on the lower non-uniform super surface (7) and the circular metal microstrip patch (91) on the upper non-uniform super surface (1) are combined into a partial reflection unit.
9. According to claimThe non-uniform super surface based high gain broadband multi-line polarized resonant cavity antenna of claim 8, wherein the calculation formulas of the square metal microstrip patch (71) with circular gap and the circular metal microstrip patch (91) size are:wherein n is the number of square rings as required, and the square rings are marked as (1), (2), (3) …>R n To correspond to the amplitude of the reflection amplitude of the square ring.
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| CN202311794484.7A Pending CN117748147A (en) | 2023-12-25 | 2023-12-25 | High-gain broadband multi-line polarization resonant cavity antenna based on non-uniform super surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117748147A (en) |
-
2023
- 2023-12-25 CN CN202311794484.7A patent/CN117748147A/en active Pending
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